Blood thickens during exercise in rare disorder, study aims to find why
NCT ID NCT07341048
First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study looks at why people with polycythemia vera (PV), a rare blood disorder that makes too many red blood cells, often struggle with exercise. Researchers will measure blood thickness and oxygen levels in 54 patients during a treadmill stress test. The goal is to see if a big jump in blood thickness during exercise limits how much oxygen the body can use, which could explain exercise intolerance.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
What this could lead to
If successful, this study could help doctors understand why exercise is hard for PV patients and design safer, more effective exercise plans.
What could go wrong
This is a small, early observational study (54 people) that only measures effects during one exercise test. It won't test any treatment, so it may not lead to direct improvements.
Disclaimer
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This is a summary of
the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Study contacts
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Contact
Phone: •••-•••-•••• Email: •••••@•••••
Locations
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Department of Sports Medicine and Physical Activity. Pulmonary Function Testing. Croix Rousse Hospital.
Lyon, 69001, France
Contact Phone: •••-•••-•••• Email: •••••@•••••
Contact
Contact
Contact Email: •••••@•••••